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7UP7

Seven-inch magnetic-focus and magnetic-deflection CRT with a relatively large useful scan and P7 long-persistence phosphor. Multiple manufacturer sources support radar and persistent instrument-display applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: IO
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

Seven-inch magnetic-focus and magnetic-deflection cathode-ray tube with a relatively large useful scan and P7 phosphor.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

Max plate voltage: 10000 V
Max screen voltage: 770 V

Promoted fields mapped by printed headings; additional data retained in parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Focusing method
Magnetic
Deflection method
Magnetic
Phosphor
P7

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Focusing method
Magnetic
Deflection method
Magnetic

Data set 03

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heater Voltage
6.3 V
Heater Current
600 mA
DeflectionMethod
Magnetic
FocusingMethod
Magnetic
Deflection Angle
53 degree
MinimumUsefulScreenDiameter
6 in
Phosphor
P7

Other

AcceleratorVoltageMaximum
10000 V

Data set 04

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Maximum Grid No. 2/screen voltage
770 V
Published maximum Grid No. 2 voltage
Anode voltagel
200 V
Anode voltagel .................. 13'200 Volts dc
Grid No. 2 Voltage
770 V
Grid No. 2 Voltage ................ 770 Volts dc
Heater Negative with Respect to cathode
200 V
Heater Negative with Respect to cathode ..... 200 Volts
Heater positive with Respect to cathode .,
200 V
Heater positive with Respect to cathode .,... 200 Volts
Grid No. 1 Circuit Resistance
1.5 Mohm
Grid No. 1 Circuit Resistance 1.5 Megohms Max.

Characteristic

Heater current
600 mA
Published heater current
Heater voltage
6.3 V
Heater voltage ............ 6.3 Volts

Data set 05

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

ittt et e ettt ettt eans
6.3 V
Published datasheet line; semantic text-layer recovery
Deflection Angle, approximate . . . ... ... . . L
53 deg
Published datasheet line; semantic text-layer recovery
Minimum Useful Screen Diameter. .. ...... ..ottt ittt iiiiin e enraneriaensasen
6 in
Published datasheet line; semantic text-layer recovery
Anode Contact Aligns with Pin No. 5=
10 deg
Published datasheet line; semantic text-layer recovery
Anode Voltage . .. ... it e et
7000 V
Published datasheet line; semantic text-layer recovery
Grid-No. 2 Voltage . . ...ttt i e i e e e et e e e
250 V
Published datasheet line; semantic text-layer recovery
Grid-No. 1 Voltagem . ..o i ittt it ittt e teae s nneenernnennas —~25to —
70 V
Published datasheet line; semantic text-layer recovery
Focusing-Coil Current A, approximate . . . ... ...ttt ittt
111 mA
Published datasheet line; semantic text-layer recovery
than
5000 V
Published datasheet line; semantic text-layer recovery